to print all palindrome number in java code example
Example 1: Java program to check palindrome string using recursion
import java.util.Scanner;
public class RecursivePalindromeJava
{
public static boolean checkPalindrome(String str)
{
if(str.length() == 0 || str.length() == 1)
return true;
if(str.charAt(0) == str.charAt(str.length() - 1))
return checkPalindrome(str.substring(1, str.length() - 1));
return false;
}
public static void main(String[]args)
{
Scanner sc = new Scanner(System.in);
System.out.println("Please enter a string : ");
String strInput = sc.nextLine();
if(checkPalindrome(strInput))
{
System.out.println(strInput + " is palindrome");
}
else
{
System.out.println(strInput + " not a palindrome");
}
sc.close();
}
}
Example 2: easy palindrome program in java
import java.util.*;
class PalindromeExample2
{
public static void main(String args[])
{
String original, reverse = "";
Scanner in = new Scanner(System.in);
System.out.println("Enter a string/number to check if it is a palindrome");
original = in.nextLine();
int length = original.length();
for ( int i = length - 1; i >= 0; i-- )
reverse = reverse + original.charAt(i);
if (original.equals(reverse))
System.out.println("Entered string/number is a palindrome.");
else
System.out.println("Entered string/number isn't a palindrome.");
}
}
Example 3: integer palindrome in java
public boolean isPalindrome(int x) {
String str = Integer.toString(x);
String reverse = new StringBuilder(str).reverse().toString();
return str.equals(reverse)?true:false;
}